A baseball is traveling (=20m/s) and us hit by a bat. it leaves the bat traveling (-30 m/s). What is the change in the velocity? remember that direction is what makes velocity diffrent speed.

What would happen if there's a increase in greenhouse effect?

The plates of a parallel-plate capacitor are 700 cm2 in area and 0.3 cm apart. The potential difference between the plates is 935 V.

What is the key variable for calculating potential energy

Suppose a car battery has an internal resistance of 0.02 ohms. The voltage between terminals when no current is flowing is 13.6 volts. (The usual value of "12 volts" for lead-acid batteries is only nominal; the actual voltage is higher.

Forces come in pairs. What are these pairs called

When a siren is approaching you, how does the wavelength of the waves reaching you compare to the actual wavelength that the siren emits?

In a harbor, you can see sea waves traveling around the edges of small stationary boats. Why does this happen?

Correct unit of speed

Technician A says that for best results, loosen the fastener immediately after spraying it with penetrating oil. Technician B says that rusted fasteners may be loosened by tapping with a hammer. Which technician is correct? a. technician A only b.

A roller coaster track is 3,000 meters long. It takes 100 seconds to travel once around the roller coaster. Is the velocity constant throughout the trip? Explain.